docstr: Create some common default values for the test sinusoid.
docstr_tok: ["Create","some","common","default","values","for","the","test","sinusoid","."]
code: def setUp(self):
      """Create some common default values for the test sinusoid."""
      super().setUp()
      self.amp = 0.75
      self.frequency = 440.0
      self.frame_rate = 250
      self.sample_rate = 16000
  
imports: from unittest import mock
  from absl.testing import parameterized
  import ddsp
  from ddsp.test_util import gen_np_batched_sinusoids
  from ddsp.test_util import gen_np_sinusoid
  import ddsp.training.metrics
  import numpy
  import tensorflow.compat.v2
label_desc: Use image node_id 1 for calling the ComputeAudioFeaturesTest obj's underlying member method code with example usage: obj.setUp() without return types